You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: I have planned to visit Denver city, can you please help me to search a flight from Oakland?

ASSISTANT: Sure,  I will help you with that. Can you please provide your preferable travelling dates?

USER: Thank you. I am willing to travel on the dates of Oct 31st and Nov 2nd.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: The origin and destination airport codes are OAK and DEN.

ASSISTANT: Are you ok with connecting flight?

USER: My preferred number of connections in between my journey should be at least one.

ASSISTANT: Any more specifications do you have?

USER: No, I didn't have any more specifications.

ASSISTANT: Please wait a moment to check the flights.

USER: Ok, take your time. I will wait.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: It's ok, not a problem with that. I will choose some other source to travel. Anyways thank you so much.

ASSISTANT: May I know your name for documentation purpose?

USER: Jack Davis here.

ASSISTANT: Ok Jack Davis, thank you for reaching us, have a great day.

USER: You are welcome.