You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Mary Nelson here.

ASSISTANT: How may I aid you today?

USER: I would like to book a ticket from SFO to DEN, can you please help me with that?

ASSISTANT: Sure, we are happy to help you. Do you have any price limit for this trip?

USER: Price limit should be 200.

ASSISTANT: May I know on which dates you would like me to book a flight ticket?

USER: The travel dates are from 02/26 to 02/28.

ASSISTANT: Thank you for your details, we have found a flight in an airline UA with 1000 number having a single connection of price 100. Shall I proceed to book?

USER: Please proceed with that.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us. Have a safe flight.