You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please assist me in booking a flight ticket from ORD to IAH to go for an adventure?

ASSISTANT: Sure, can you provide me with the itinerary travel dates?

USER: My depart date is Apr 28 and return will be on Apr 30.

ASSISTANT: May I know if you have any time concern?

USER: I am flexible to travel at any time.

ASSISTANT: Let me know if you have any connection limit?

USER: I prefer a flight having maximum connection of one.

ASSISTANT: Are there any more preferences that you want to avail?

USER: No, I don't have any other.

ASSISTANT: May I ask for your name?

USER: Sure, I am Michelle Thompson.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Michelle Thompson. I regret to inform that there are no flights on your route with the given dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.