You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi.

USER: I am Rachel Miller.

ASSISTANT: How might I help you?

USER: I have planned to visit Dallas, but due heavy rains I  want to cancel my reservation. Can you help me out with this?

ASSISTANT: Ya sure. Share your traveling details.

USER: Can you please cancel my reservation?

ASSISTANT: Ya sure. Give me a minute. Sorry we couldn't find any reservation on your name.

USER: Ok. Thank you.

ASSISTANT: Thank you.