You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Kimberly Wilson.

ASSISTANT: How may I assist you?

USER: I want to change my existing reservation due to some changes in my trip. Can you help me with that?

ASSISTANT: Kimberly, please wait.I will check your details.

USER: No issues.

ASSISTANT: Sorry there is no reservation found under your name.

USER: Thank you for the quick response.

ASSISTANT: Thank you for choosing us.