You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book a ticket from ATL to DFW to attend my friend's birthday.

ASSISTANT: That's nice, may I know your preferred dates of journey?

USER: Travel dates are 05/05 to 05/07.

ASSISTANT: May I know your name, please?

USER: Kevins Collins, here.

ASSISTANT: No airline is providing service on that route for your given dates, Collins.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing our service.