You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Katherine Lee here.

ASSISTANT: How may I guide you?

USER: I want to reserve my ticket from MCO to IAD, can you please help me?

ASSISTANT: Lee, I am willing to help you. When you are planning to travel?

USER: Sure, my planned dates of journey are from 09/05 to 09/07.

ASSISTANT: Please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Lee sorry for inconvenience, no flights are available with your criteria.

USER: That's fine. Thank you for your service.

ASSISTANT: Thank you Lee for utilizing our agency.