You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Wilson from Chicago.

ASSISTANT: How may I assist you today?

USER: I would like to attend a seminar on social issues in pioneer plaza at Houston, TX - IAH. Can you book me a less expensive flight within price 200 to reach there?

ASSISTANT: Sure, may  I know your source airport code please?

USER: Sure, my source airport Chicago, IL - ORD.

ASSISTANT: May I know your trip dates please?

USER: My planned journey dates are on 04/20 to 04/22.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting, we found connecting flight 1011 in Delta airline with fare of 200. Shall I proceed to book?

USER: Ok, please proceed for booking in Delta airline.

ASSISTANT: Your flight ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.