You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Barbara Martin, I would like to change my recent reservation, can you help me to change this?

ASSISTANT: Ok, please wait a moment I will let you know about your current reservation status.

USER: Sure, take your own time to change that reservation.

ASSISTANT: I am appreciating your patience, I could not find any reservation with your name.

USER: That's fine, thanks for your information.

ASSISTANT: Thanks for contacting us.