You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me to book a flight to IAH from PHL?

ASSISTANT: Sure, may I know your name?

USER: Sure, Raymond Hernandez here.

ASSISTANT: When are you planning to travel?

USER: I want to travel in the month of Aug 29 and 31.

ASSISTANT: Do you have any other specifications?

USER: I want to travel in economy class.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for reaching us.