You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Thomas Garcia.

ASSISTANT: How may I help you?

USER: Can you help me to change my reservation to next week?

ASSISTANT: Sure, please give me a minute to check your reservation status.

USER: Sure, please check my details in your records.

ASSISTANT: There is no reservation found under your name.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: Most welcome.