You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am John Lewis, I am planning for a trip from PHX to IAD. Can you help me with bookng?

ASSISTANT: Sure, can I know your travelling dates?

USER: Ok, my journey dates are from 10/03 and 10/05.

ASSISTANT: Sorry, there are no flights found on given schedule.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.