You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me in booking my flight from PHL to reach BOS, as I have a sports meet there?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Thank you. I would like to start on Mar 19th and return on Mar 21st.

ASSISTANT: Do you have any preferences about class?

USER: I don't have any class preference.

ASSISTANT: Do you have any preferences about flight connections?

USER: I would prefer a direct flight, as I have an urgent sports meet.

ASSISTANT: Please mention your name.

USER: My name is Michael Baker.

ASSISTANT: There are no flights found under your preferable details.

USER: Please check once again, as my depart time must be in the afternoon.

ASSISTANT: There are no flights found under your preferable details.

USER: Ok, no problem. Anyways, thank you for the information.

ASSISTANT: Thanks for reaching us, have a great day.