You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am John Mitchell. I am planning to celebrate my friend birthday. Can you help me in booking the ticket?

ASSISTANT: Sure, can you provide me your travelling dates?

USER: My planning dates are from 12/25 to 12/27.

ASSISTANT: OK, do you have any price and connection limit?

USER: My price is 200 and with 1 connection.

ASSISTANT: Can you provide me your airport codes?

USER: My destination airport code is IAH and Source is LAS.

ASSISTANT: Please wait for a minute, let me check and revert you.

USER: Sure.

ASSISTANT: Thanks for waiting, I found a flight with Delta airline with single connection and price of 200. Flight number 1011. Shall I proceed with booking?

USER: That's great to hear, please proceed.

ASSISTANT: Your ticket has been booked.

USER: You are welcome.

ASSISTANT: Thank you, for reaching us.