You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Patrick Hall here. Please help me out in booking the ticket from ORD to IAH.

ASSISTANT: Sure, I am willing to help you. Can I know on which dates you want to travel?

USER: My trip dates will be Oct 18 to Oct 20.

ASSISTANT: Ok, do you need any connection in between the journey?

USER: I want direct flight.

ASSISTANT: Ok, please share your other preferences.

USER: Normal cost is my airline preference.

ASSISTANT: Wait a minute please.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry no flights found with your details.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, have a good day.