You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ruth Campbell here.

ASSISTANT: Can you please let me know how may I help you?

USER: I would like to change my recent reservation due to some health issues, can you please help me out with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please give me a minute to check the ticket status.

USER: Sure, I will wait for your response.

ASSISTANT: I am so sorry to inform you, I have not found any reservation with your name in our portal to change the details.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: You are most welcome. Thank you for reaching us.