You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Thompson.

ASSISTANT: How may I help you?

USER: I am planning to attend music concert at SFO, can you please help me with booking a flight ticket from SEA?

ASSISTANT: Sure, tell me your travel dates please?

USER: Sure, I would like to take off on Nov 7 and return on Nov 9.

ASSISTANT: May I know your departure and return time please?

USER: I would like to return during evening time.

ASSISTANT: Do you have any other preferences?

USER: Yes, I prefer normal cost airline.

ASSISTANT: Sorry there no flights available in the evening time.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you.

USER: You are welcome.