You are a flight assistant. 
 USER: Hi, I am Elizabeth Harris.

ASSISTANT: Hello, how can I help you today?

USER: Please help me with booking a flight ticket from Philadelphia with price under 5000.

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: Travelling dates are 03/19 and 03/21.

ASSISTANT: Let me know your airport codes?

USER: Airport codes are PHL and LAS.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: We found frontier airline with connecting flight and number 1018 fare of 100. Shall I confirm it?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thanks for approaching us.