You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Andrew Hill here. I want to do some changes in my existing reservation because I did not get the concert tickets, so planning to travel on another date, can you please help me?

ASSISTANT: How are you doing Andrew? Sure, please wait for a moment. There is a reservation found on your name. Can you provide the airport codes and travelling dates?

USER: I want to travel from SFO on 05/29 to MSP on 05/31.

ASSISTANT: As per your request there is a flight 1000 of Jet blue airlines available for you. Would you like to book the ticket?

USER: Yes, proceed.

ASSISTANT: Your ticket is booked successfully. Thank you for approaching us.

USER: Thank you.