You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: I want to travel from PHL to IAD, can you please avail me a flight ticket?

ASSISTANT: Sure, please help me with your travelling dates.

USER: My travelling dates are from Jan 19th to Jan 21st.

ASSISTANT: Ok, Do you prefer direct flight or connected flight?

USER: I am comfortable with any flight.

ASSISTANT: Ok, Do you have any class preference?

USER: No other preferences.

ASSISTANT: Thank you for providing details, we found a connecting flight in 1023 Frontier Airlines with a fare of 100. Can I proceed?

USER: Please proceed.

ASSISTANT: May I know your name?

USER: I am Melissa Clark.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.