You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you?

USER: I want to change my reservation due to health problem, can you help me?

ASSISTANT: sure, may i know your name to check the status.

USER: Myself Sharon Gonzalez.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: There is no reservations found by your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for picking us.