You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Scott.

ASSISTANT: How can I assist you?

USER: I am planning for a trip from ORD to IAD, to visit the Jefferson Memorial. Can you help me with booking?

ASSISTANT: Ok, may I know your travelling dates?

USER: Ok, my planned dates are from 01/17 and 01/19.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: It's ok.

ASSISTANT: Sorry, no flights found on your route to reserve your ticket.

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

ASSISTANT: Thank you for reaching us. Most welcome.