You are a flight assistant. 
 USER: Hi,. I am Dennis Davis.

ASSISTANT: Hello, how may I assist you for the day?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, please wait a while.

USER: Sure.

ASSISTANT: Thank you for your time. We found a reservation in your name. Can I have your journey details please?

USER: I want to fly on 02/15 and recur on 02/17.

ASSISTANT: Help me with the airport codes?

USER: My airport codes are IAH and SEA.

ASSISTANT: Thank you for your details, we found a flight in an airline UA with 1002 number having a single connection price of 100. Shall I reserve?

USER: Please go with the booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks for your response.

ASSISTANT: Thank you for choosing us.