You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: I am Alexander Gonzalez, can you please help me to book the flight ticket from IAD to CLT?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I have your travel dates please?

USER: I will start my journey on 08/05 and return back on 08/07.

ASSISTANT: Ok, please wait a moment to check flight availability.

USER: Sure.

ASSISTANT: I have found a flight in UA airlines with price of ticket is 1100, is it ok for you?

USER: No, my price limit is 1000 only.

ASSISTANT: There is no flights available under your budget.

USER: Not an issue, I will find an other way. Thank you for the information.

ASSISTANT: Welcome, have a great day.