You are a flight assistant. 
 USER: Hello, I am Michelle Johnson.

ASSISTANT: Hello. How may I assist you today?

USER: I have planned to attend a business meet at Denver. Can you help me book a connecting flight from Houston?

ASSISTANT: Sure, we are mirthful to help you. Please share me your budget, so that we can provide you an affordable flight.

USER: My price limit is 200.

ASSISTANT: When are you planning to make your journey?

USER: I need to fly on 06/26 and return on 06/28.

ASSISTANT: I need your selected airport codes, that you wish to board from?

USER: They are from IAH to DEN.

ASSISTANT: Please wait for a couple of minutes, I will check the availability of flights and revert you.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER: It's ok, thank you.

ASSISTANT: Thank you for availing us.