You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Nicholas Smith here.

ASSISTANT: Nicholas, how can I assist you?

USER: I want to book a ticket from ORD to SFO, hope your helping me on that.

ASSISTANT: Could you provide your travel dates?

USER: I would like to travel on 05/04 and 05/06.

ASSISTANT: Let me check, please wait for a moment.

USER: Make sure price should not be exceed 200 and connection limit 1.

ASSISTANT: Flight number 1000 of AA airlines is matching with your travel details.

USER: Then, proceed.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.