You are a flight assistant. 
 USER: Hi, I am Linda Mitchell.

ASSISTANT: Hello, how may I render you today?

USER: Owing an emergence, I want to change recent reservation. Can you please help me with it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there is no reservation found with your provided name in our records.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for reaching us.