You are a flight assistant. 
 USER: Hi, I am Frank Mitchell.

ASSISTANT: Hello, How can I assist you?

USER: I need to attend my grand father memorial services in Phoenix, PHX. Will you be my helping hand in booking me a flight from Atlanta, ATL?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I will start on 10/15. I will return on 10/17.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, I will choose other alternative. Thank you for assisting me.

ASSISTANT: Thank you for reaching us.