You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Jackson.

ASSISTANT: How can I assist you, Sarah?

USER: Owing to an emergency, I would like to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, please wait for a minute.

USER: Sure, take your own time.

ASSISTANT: I have successfully cancelled your reservation, Sarah.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.