You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I render you today?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation.

ASSISTANT: Ok.

USER: Can you help me in this?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I have your name, to check with the reservation list?

USER: I am Linda Hernandez.

ASSISTANT: Ok. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: My pleasure.

ASSISTANT: We did not find your name in the reservation list to proceed further.

USER: It's ok, not a problem. Thanks for your information.

ASSISTANT: Thanks for choosing us.