You are a flight assistant. 
 USER: Hello. I am Nancy Lopez here.

ASSISTANT: Hello. How can I assist you today?

USER: I want to reserve my ticket from ORD to LGA, can you please help me in this?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my dates of journey are from 04/05 to 04/07.

ASSISTANT: Please give me a moment.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting, there is no reservation found under your name. Sorry, there is no flights found under your preferable details.

USER: Ok, no problem.

ASSISTANT: Thanks for reaching us, have a great day.

USER: Thank you for your service.