You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to book a ticket from PHX to SFO, can you help me?

ASSISTANT: Let me know the travel dates please?

USER: My travel dates are Jan 19 and 21.

ASSISTANT: Is there any class preference?

USER: I prefer in economy class.

ASSISTANT: Do you have any connection preference?

USER: I need a connecting flight.

ASSISTANT: Are there any more preferences?

USER: I prefer to travel in economy class.

ASSISTANT: May I know your name please?

USER: I am Daniel Taylor.

ASSISTANT: Sorry to inform that there are no flights on your route.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.