You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER:  I would like to change my reservation as I am leaving for delegates meet, can you please help me out?

ASSISTANT: Sure, will you mention your name for checking the reservation status?

USER: Check under the name Elizabeth Perez.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a great day.