You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello,.

USER: I am Sandra Garcia.

ASSISTANT: How may I render you?

USER: Could you please make a flight reservation to go for a round trip to Philadelphia, PA - PHL?

ASSISTANT: Sure, help me with the travel dates?

USER: My trip dates are 02/28 - 03/01.

ASSISTANT: There are no flights running in your preferred dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for your presence.