You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I address you?

USER: Katherine Baker here. Please help me out in booking the ticket from DTW to SFO.

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates will be 14 to 16 of the Feb month.

ASSISTANT: Do you prefer an economy class ticket or business class ticket?

USER: I am ok with any class.

ASSISTANT: At what time do you want to depart and return?

USER: My return time must be in the afternoon.

ASSISTANT: How many number of connections are you looking for?

USER: Only 1 connection required.

ASSISTANT: Ok, please give me a moment.

USER: Ok.

ASSISTANT: Katherine Baker, we regret to inform that currently there no flights available matching your request.

USER: That's ok. Thank you.

ASSISTANT: Thank you for approaching us.