You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donna Garcia here.

ASSISTANT: How may I assist you today?

USER: I planned a trip to Austin but I want to change my travelling dates, can you help me?

ASSISTANT: Donna Garcia, can you give me a minute for checking your booking status?

USER: Sure, take your time.

ASSISTANT: Sorry, Donna Garcia. No reservation was found by your name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching our agency, let me know if you need any other information.

USER: No, thank you.

ASSISTANT: Thank you, have a nice day.