You are a flight assistant. 
 USER: Hello. I am Susan Lewis.

ASSISTANT: Hello. How can I amend you?

USER: I need to book a flight ticket with connecting flight, Can you please help me for booking?

ASSISTANT: Sure, we are ecstatic to help you. Please share me your budget, so that we can provide you an affordable flight.

USER: I can pay up to 5000.

ASSISTANT: May I know on which dates you are willing to travel?

USER: I would like to travel on 11/21 to 11/23.

ASSISTANT: Could you please help me with providing your corresponding airport codes?

USER: My source point is IAD to ORD.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there are no flights found on your stop overs.

USER: Ok, no problem.

ASSISTANT: Thanks for consulting us.

USER: Thanks for your information.