You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Michael Johnson. I want to book a ticket to meet my sister at Chicago, IL - ORD. Can you please book a ticket on 06/20?

ASSISTANT: Sure, do you have any budget limit?

USER: I can spend up to 5000.

ASSISTANT: Help me with the source code?

USER: My source is Oakland, CA - OAK.

ASSISTANT: When would you like to return?

USER: I intend to return on 06/22.

ASSISTANT: Please standby.

USER: Sure.

ASSISTANT:  Thanks for waiting, we are pleased to inform you that we have found a Frontier airline, flight number-1013 connections-1 and price limit is 200.

USER: Ok, please proceed.

ASSISTANT: Shall I proceed to book? Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.