You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Jerry Mitchell.

ASSISTANT: How can I help you?

USER: I would like to change my recent booking due to make some changes in my travelling dates, can you please help me?

ASSISTANT: Sure, please wait a moment let me check and revert to you.

USER: Sure.

ASSISTANT: Happy to inform you that I found a reservation in your name. May I know your trip dates?

USER: Sure, the travelling dates are  12/22 and return on 12/24.

ASSISTANT: Help me with the source and destination codes.

USER: The nearest airport codes are HOU and IAH.

ASSISTANT: I found a flight in an airline Delta with the number 1003. Shall I proceed to book?

USER: Yes, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: I appreciate your quick help in my changing, thank you so much.

ASSISTANT: Thank you for reaching us.