You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicholas Green.

ASSISTANT: How can I help you?

USER: I need to attend a cultural festival in Washington so please help me with flight ticket booking from OAK to IAD.

ASSISTANT: Yes, I will definitely try my best to help you in booking your flight ticket. Could you please provide your planned dates of journey?

USER: Thank you. I have planned to travel on the dates of Sept 14 and Sept 16.

ASSISTANT: Do you have any connection preference?

USER: Yes, my at most preferable connection 1 and I am ok with direct flight also.

ASSISTANT: Please share your class preference.

USER: Today I am looking for business class due to some health issues.

ASSISTANT: Do you have any other specifications on your trip?

USER: I would like to depart in morning and returning in afternoon time.

ASSISTANT: Please stand by.

USER: Sure, take your time.

ASSISTANT: We regret to inform you that there are no flights moving to your region with your planned dates of travelling.

USER: It's ok fine, I will go with another agency this time. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Most welcome.