You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sandra Jones.

ASSISTANT: How may I help you?

USER: There is a meeting with my client in Washington, so I want to book a ticket from Phoenix.

ASSISTANT: Sandra Jones, can you tell me your travelling airport codes for this trip?

USER: I am departing from PHX airport and land in Washington IAD airport.

ASSISTANT: What dates are you planning for this journey?

USER: My departing date is on 03/24 and return on 03/26.

ASSISTANT: Sorry, there is no fight available for your trip.

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

ASSISTANT: Thank you for reaching our agency.