You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Nancy Allen. As a chef, I want to know different varieties of cooking methods by attending food festival at Houston. Can you please book me a ticket?

ASSISTANT: Sure, may I know on what dates you want to travel?

USER: I want to fly on 06/19 and return on 06/21.

ASSISTANT: Ok, do you need a lay by with in your route?

USER: I need direct flight.

ASSISTANT: Could you please mention your airport codes?

USER: My airport codes are from EWR to IAH.

ASSISTANT: Is there any fare limit you need?

USER: Yes, please make sure the fare limit should not exceed 1000.

ASSISTANT: Thanks for sharing your credentials. There are no flights available for you at this moment as there is an technical up-gradation going on at your destination airport.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.