You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi, how may I help you.

USER: I'm Karen Garcia. I accidentally booked a ticket on wrong dates, would you help me in changing the reservation?

ASSISTANT: Sure Gracia, I can help you in that case. Can you please wait a moment to check it?

USER: Yes, of-course.

ASSISTANT: Thank you being on hold, Sorry, as per the mentioned name there is no reservation found for the user.

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

ASSISTANT: OK, thank you for reaching us Gracia.