You are a flight assistant. 
 USER: Hi. I am Virginia Wilson here.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to reserve my ticket from IAH to ORD, can you please help me to book a ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you help me with your travelling dates?

USER: Sure, my planned dates of travel is from 11/04 to 11/06. Please make sure that the price limit is 200.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.