You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Janet Campbell here.

ASSISTANT: How can I assist you?

USER: I want to meet my mother-in-law, so please book my ticket from PHX to DCA.

ASSISTANT: Sure, I'll help you in that. May I know your preferable journey dates please?

USER: My itinerary dates are 07/28 and 07/30.

ASSISTANT: Ok, please be on hold for few seconds.

USER: Sure.

ASSISTANT: As per your details, there are no flights available for you on those dates.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.