You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you at this moment?

USER: I want to book a ticket from IAD to PHX. Could you book a ticket?

ASSISTANT: Sure, please share your travelling dates.

USER: Departure date is June, 24 and return is June, 26.

ASSISTANT: Ok, do you need any lay by in between the journey?

USER: I need a halt.

ASSISTANT: May I know your good name please?

USER: My name is Susan Campbell.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There are no flights found on your requested dates.

USER: Thanks.

ASSISTANT: Thank you for reaching us.