You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Christine Clark.

ASSISTANT: How may I aid you?

USER: I would like to travel from LAX to DTW, could you help me out?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My preferable dates are from 02/26 to 02/28.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Christine Clark, there are no flights available in your route.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for reaching us.