You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Margaret Nelson.

ASSISTANT: In which way I can help you?

USER: I want a plan to visit Houston, can you help me in booking a flight from PHL to IAH?

ASSISTANT: Sure, help me in providing your leaving dates.

USER: My travelling dates are 02/23 to 02/23. I want a direct flight.

ASSISTANT: I am sorry. No flights found on your details.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.