You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please change my existing reservation as my scheduled interview got postponed?

ASSISTANT: Kindly mention your name to proceed further?

USER: I am Emily Smith.

ASSISTANT:  Ok, please wait.

USER: Sure.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: Ok, not an issue. Thank you for your response.

ASSISTANT: Thank you for choosing us.