You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to change my existing reservation which is done recently due to some health issues, can you please help me?

ASSISTANT: Yes, I can help you.

USER: Thank you.

ASSISTANT: Can I know your name for checking?

USER: Sure, my name is Brandon Davis.

ASSISTANT: I have found reservation on your name. Can you share me your dates of travel?

USER: Sure, my dates of journey are from May, 01 to May, 03.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: Ok, my respective airports codes are from LAX to DCA.

ASSISTANT: Give me a moment.

USER: Sure, I will wait.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: Ok, please proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Anyways, thank you for your service.

ASSISTANT: Thank you for contacting us.