You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best can I guide you today?

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

ASSISTANT: Sure, when are you planning to start and return on?

USER: Ok, please book a ticket for the dates May 14 and May 16.

ASSISTANT: Do you need a connecting flight?

USER: Ok, please book a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can I know your good name?

USER: My name is Samuel Martin.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you.