You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Edward Hall. Can you please book a ticket for me as I am planning to go for Heard museum at Phoenix, PHX?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Journey dates are 05/10 to 05/12.

ASSISTANT: Where would you like to start from?

USER: Source code is Seattle, SEA.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according to your requirement.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.