You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I am Anna Smith. Owing to an emergency, I am requesting you for the cancellation of my reservation. Please help me in cancellation of my ticket with your hand.

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please wait for a moment, I will check the reservation list and revert you.

USER: Sure.

ASSISTANT: Thank you for being patience.

USER: Ok.

ASSISTANT: We found that, there is no reservation available with your specified name.

USER: No problem. Thank you for your response.

ASSISTANT: Thank you for contacting us.