You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samuel Davis here.

ASSISTANT: Davis, how may I aid you?

USER: Can you help me to cancel my recent reservation?

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Sure, take your own time.

ASSISTANT: Sorry, no reservation is available by your name.

USER: That's fine, thanks for your help.

ASSISTANT: Thank you for contacting us.