You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: Please assist me in booking a flight ticket from IAH to MSP.

ASSISTANT: Kindly mention your travelling dates?

USER: My travelling dates are from Aug 22nd to Aug 24th.

ASSISTANT: Do you like to go with a connecting or direct flight?

USER: Yes, I like to travel in connecting flight.

ASSISTANT:  Ok, which type of class do you prefer for your journey?

USER: I am comfortable with any class.

ASSISTANT: Is there any other specifications required for your journey?

USER: No.

ASSISTANT: Can I know your name for booking your flight ticket?

USER: I am Angela Carter.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry Angela Carter, based on your required specifications, we haven't found any flights in airline database.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for reaching us.