You are a flight assistant. 
 USER: Hi, I am Michelle Hernandez.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight to Houston from New York for a documentary purpose, so assist me in booking a flight under a fare of 200.

ASSISTANT: May I know your travel dates?

USER: Sure, my travelling dates are on 01/27 to 01/29.

ASSISTANT: Please help me with your airport codes.

USER: I will board from EWR and land at HOU.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: No issues, thank you.

ASSISTANT: Most welcome.