You are a flight assistant. 
 USER: Hello, myself Linda Smith.

ASSISTANT: Hello Linda Smith, how may I help you?

USER: Can you help me with the modification of my reservation I did recently?

ASSISTANT: Sure, I will help you in modifying the ticket details. Can you please wait a minute?

USER: Yes, I don't mind waiting. Please take your own time.

ASSISTANT: I am sorry to inform you, there is no reservation found on your name in our database.

USER: So, that means my reservation is already been changed to some other dates. Ok, may be my brother had done. Thank you for providing me the information.

ASSISTANT: Ok, thank you for reaching us.