You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dorothy Davis here.

ASSISTANT: Davis, how may I aid you?

USER: Can you please help me out in changing my recent reservation? As my health is not in a good condition to do journeys.

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: Oh! May be I have done a wrong booking, thank you so much for your quick response anyways.

ASSISTANT: Thank you for approaching us.