You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I render you today?

USER: I would like to change my existing reservation, due to sudden change in the adventure trip. So, can you help me in this?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Please, stay online I will check the reservation and revert to you.

USER: Sure.

ASSISTANT: To check with the reservation I need your name.

USER: I am James Jackson.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: There is no reservation found on your name in our database.

USER: Thanks for the information.

ASSISTANT: Thank you for opting us.