You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Pamela Miller. I need a flight ticket booking from IAH to CLT to attend a meeting, can you please help me with that one?

ASSISTANT: Sure, can you share your trip dates?

USER: Thank you and I want to take off on Dec 20 and I will return back on Dec 22.

ASSISTANT: Do you have any preferences?

USER: I need a flight which will return in the evening time with a connecting flight.

ASSISTANT: Give me a minute.

USER: Sure, I can wait for your response.

ASSISTANT: Sorry, there is no flight on your given timing.

USER: Sad to hear that one, I can prefer any other source to reach my location. Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.