You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: Can you please help me in booking a flight ticket from SFO to DEN?

ASSISTANT: Sure, may I know on which dates you wish to travel?

USER: I wish to start my journey on Dec 23rd and return on Dec 25th.

ASSISTANT: May I know your name please?

USER: I am Timothy Williams.

ASSISTANT: Is there any airline preference in your journey?

USER: No.

ASSISTANT: Please let me know your connection limit.

USER: I want a single connection in between my journey.

ASSISTANT: Do you have any more specifications in your journey?

USER: I want to depart in the afternoon.

ASSISTANT: Sorry, there are no flights are available on your preferred routes, due to bad weather conditions.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.