You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be of your help?

USER: Emily Walker here. I was looking for a flight on the route from Houston IAH to Boston BOS to meet my boss, can you help me?

ASSISTANT: Sure, I am glad to help you. How much you can afford for your journey?

USER: I budget is only 5000 for this trip.

ASSISTANT: Ok, are you looking for direct flight or connecting flight?

USER: I need a direct flight for this journey.

ASSISTANT: Could you please help me with your scheduled dates?

USER: I would like to takeoff on 11/19 to 11/21.

ASSISTANT: We hardly tried to provide you the flight, but unfortunately no flights found with your given credentials.

USER: Oh! That's very sad to hear from you, I will try to contact other agency for my booking.

ASSISTANT: Ok.

USER: Anyways, thank you for checking.

ASSISTANT: Thanks for approaching us, have a good day.

USER: Most welcome.